[FFmpeg-devel] [PATCH] ARM: NEON optimised simple_idct

Måns Rullgård mans
Mon Aug 25 22:31:59 CEST 2008

M?ns Rullg?rd <mans at mansr.com> writes:

> Michael Niedermayer <michaelni at gmx.at> writes:
>> Still its likely better to use a transposed permutation instead of
>> the identity one as this means 1 transpose less in a SIMD IDCT.
> That idea struck me as well.  I'll try it out.

It saves 8 instructions per block, it seems to be a slightly faster
too, so I've made the changed in my tree.

M?ns Rullg?rd
mans at mansr.com

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